Type-casting machine.



(No Model.)

Patented Apr. 24, |900. G. A. GOODSON; TYPE CASTING MACHINE.

(Application Bled Sept. 12, 1899.)

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| Tins cufPNUTaLIT-o.. wAswNGToN n c NrrED STATES GEORGE ARTHUR GoODsON, or MINNEAPOLIS, MINNESOTA.

TYPE-CASTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 648,025, dated April 24, 1900. Original application letl July 8, 189 9, Serial No. 723,133. Divided and this application iled September 12,1899. Serial No.

enable others skilled in the art to which it` appertains to make and use the same.

My invention relates to type-casting machines, and has for its object to provide an improvement whereby increased efficiency is secured.

To this end my invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

To persons familiar with the art of typefounding it is of course well known thattypemetal is an alloy. It is usually composed of lead, tin, antimony, and bismuth. It is also Well known to those familiar with the art that much difficulty is experienced from the deposit of more or less of these ingredients of the alloy-especially from antimony-in some or all of the parts through which the molten metal is conducted from the melting-point to the casting-point, or, in other words, from the melting-pot to the mold. I have discovered that the said ingredients of the alloy typemetal will not adhere to aluminium. Hence by transmitting the molten metal through a conductor or conductors having an inner surface of aluminium the difficulty arising from the deposit of antimony or any of the other ingredients of the type-metal may be entirely overcome.

I have illustrated my invention as applied to a type-casting machine of the kind known to the trade as the Goodson Type-Casting Machine. This Goodson type casting and setting machine is fully disclosed in several of my prior patents-as, for example, in my United States patents .of December 4, 1894, June 21, 1898, and August 16, 1898, as made prior to my present invention. Only that portion of said Goodson'machine which is concerned with the handling of the molten metal (No model.)

is illustrated in the drawings, as that is su fiicient for the purposes of this case.

In said drawings, Figure l is a View, partly in elevation and partly in vertical section, with some portions broken away, illustrating part of the Goodson type-casting machine as constructed with my present invention embodied therein. Fig. 2 is a detail showing a cross-section of the conducting-tube for the molten metal.

In the Goodson machine the melting-pot c is located remotely from the mold b b2 b3 and the hot metal a' is conducted from the meltingpot to the mold through a suitable conducting-tube c c'. This conducting-tube, as shown, is made up of an outer or main tube c and an inner or lining tube c'. The outer or main tube cis preferably composed of steel, but maybe made of other suitable hard metal. The inner or lining tube c is composed of aluminium. It may be applied to the outer or steel tube c in any suitable. way which will secure close contact between the two. In practice I provide an aluminium tube of smaller diameter than the outer or steel tube, and after placing the former within the latter I swage the aluminium tube to the steel tube by drawing afollower through the aluminium tube and spreading the same into close contact with the inner surface of the steel tube. The conducting-tube terminates in a nipple c2, which has been regarded as part of the tube, as it is made up of steel lined with aluminium in exactly the same Way as the main portion of the tube.

Before my presentinvention I employed a conducting-tube which was composed entirely of steel. The tube-nipple c2 is necessarily of small bore. While so using a steel tube I experienced considerable difficulty from the deposit in the tube of some of the ingredients of the type-metal, especially-from the deposit of antimon y. This was most trou` blesome at the nipple, for the reason that the small passage in the nipple could be easily clogged or closed by the antimony. Antimony is very'hard, and hence very difficult to remove. The amount of deposit varied greatly, according to the character of the type-metal. If the type-metal was exactly IOO right, much less trouble was experienced. I have found it, however, impossible to procure type-metal of uniform quality. Different lots of the same commercial grade will frequently vary to a considerable extent. With the use of my present invention I find no difficulty whatever from the deposit of antimony or others of the ingredients or compounds of ingredients from the type-metal. The bore in the conduct-ing-tube keeps clear, and hence the metal can be transmitted without obstruction.

While I have described the cond ucting-tu be as being a steel tube lined with aluminium, it will be understood, of course, that I do not limit myself to this compound tube made up of steel and aluminium. Any conductor adapted to transmitting molten type metal which may be provided with an aluminium inner surface is within the scope of my invention in the broad point of View. The steel tube lined with aluminium is preferable for my machine, because I need a spring action at the outer end of my tube. In other type-casting machines the delivery nozzle or tube from the melting-pot may be made from otherkinds of metal or be of other shape, but if lined with aluminium or otherwise provided with an inner surface of aluminium correspondinggood results will be secured.

Having regard to some of the details of the Goodson machine shown in the drawings, the metal a in the melting-pot (t is kept in a molten condition from a suitable gas -burner a2 or otherwise. The melting-pot ct is shown as supported by a bracket a3, bolted to the vertical plate fof the machine-frame, and is heatinsulated therefrom by a body of asbestos a4. The melting-pot is provided with a suitable force-pump a5 for forcing the molten metal from the melting-pot into the mold-cell h at the proper times. The nipple c2 is shown as in casting position, with its upper end seated in the nippleor guide-plate h, which is also the base-plate of the body-mold, on Which the members b2 are mounted for lateral movement for purposes not necessary here to note. The matrix-block b3 is also shown as held in casting position for cooperation with the other elements of the mold bya suitable centering device b4. The nipple or base-plate b' of the mold is shown as resting on outwardly-projecting lugs h,carried at the upper end of a verticallymovable plate h2, which is supported Within suitable guides formed in standards h3, rising from the horizontal member f of the machineframe.

The nipple c2 is shown as provided with a collar or yoke c3, resting on a plate c4, carried at the upper end of a slide c5, which is mounted for independent vertical movement within suitable guides c6, carried by the vertically-movable plate h2.

In the Goodson machine the body-mold is adjustable by means (not shown) for affording a mold-cell b of any desired Width for c0- operation with any selected member of the matrices on the matrix-block b3 when the latter is properly centered and held in casting position. These details as to the mold and the mounting of the nipple, &c.,have been specified simply because they are shown. So far as the present invention is concerned it is of course immaterial what may be the form of the mold or in what way the particular details may coperate as long as type may be cast thereby from the molten metal which is forced through the conducting-tube or delivery-nozzle leading from the melting-pot to the mold.

This application is filed as adivision of my pending application, Serial No. 723,133, iiled July 8, 1899. Division is made at the demand of the Commissioner of Patents -in his communication in said pending case, Serial No. 723,133, of date July 2S, 1899.

The broad claim to my new process or method as an improvement in the art of typefounding-to wit, the transmitting of the molten metal from the melting-point to the casting-point through a conductor` or conductors having an inner surface of aluminium- Will be found in the said pending application. The present application is confined to apparatus or mechanism for carrying out the said process or improvement in the art.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In a type-casting machine, the combination with a melting-pot and a mold, of ametallic conductor having an inner surface of aluminium, for transmitting the molten typemetal from the melting-pot to the mold, substantially as described.

2. In a type-casting machine, the combination with a melting-pot and a mold, of a conductor for transmitting the molten metal from the melting-pot 1o the mold, which conductor is composed of steel or other hard metal lined on its interior with aluminium, substantially as and for the purposes set forth.

3. In a type-casting machine, the combination with a melting-pot, a mold and a force-V pump in the melting-pot, of a metallic conductor having an inner surface of aluminium for conducting molten metal from the melting-pot to the mold under the action of said pump, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORG-E ARTHUR GOODSON.

Witnesses:

MABEL M. MoGRoRv, Jas. F. WILLIAMSON.

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